<template>
  <div style="height: 100vh; display: flex; align-items: center; justify-content: center; background-color: #0f9876">
    <div style="display: flex; background-color: white; width: 50%; border-radius: 5px; overflow: hidden">
      <div style="flex: 1">
        <img src="@/assets/login.png" alt="" style="width: 100%">
      </div>
      <div style="flex: 1; display: flex; align-items: center; justify-content: center">
        <el-form :model="user" style="width: 80%" :rules="rules" ref="loginRef">
          <div style="font-size: 20px; font-weight: bold; text-align: center; margin-bottom: 20px">欢迎登录后台管理系统</div>
          <el-form-item prop="username">
            <el-input prefix-icon="el-icon-user" size="medium" placeholder="请输入账号" v-model="user.username"></el-input>
          </el-form-item>
          <el-form-item prop="password">
            <el-input prefix-icon="el-icon-lock" size="medium" show-password placeholder="请输入密码" v-model="user.password"></el-input>
          </el-form-item>
          <el-form-item prop="code">
            <div style="display: flex">
              <el-input placeholder="请输入验证码" prefix-icon="el-icon-circle-check" size="medium" style="flex: 1" v-model="user.code"></el-input>
              <div style="flex: 1; height: 36px">
                <valid-code @update:value="getCode" />
              </div>
            </div>
          </el-form-item>
          <el-form-item>
            <el-button type="primary" style="width: 100%" @click="login">登录</el-button>
          </el-form-item>
          <div style="display: flex">
            <div style="flex: 1">还没有账号？请 <span style="color: #0f9876; cursor: pointer" @click="$router.push('/register')">注册</span></div>
            <div style="flex: 1; text-align: right"><span style="color: #0f9876; cursor: pointer" @click="handleForgetPass">忘记密码</span></div>
          </div>
        </el-form>
      </div>
    </div>

    <el-dialog title="忘记密码" :visible.sync="forgetPassDialogVis" width="30%">
      <el-form :model="forgetUserForm" label-width="80px" style="padding-right: 20px">
        <el-form-item label="用户名">
          <el-input v-model="forgetUserForm.username" autocomplete="off" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item label="手机号">
          <el-input v-model="forgetUserForm.phone" autocomplete="off" placeholder="请输入手机号"></el-input>
        </el-form-item>
        <span> 重置后的默认密码为123</span>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button @click="forgetPassDialogVis = false">取消</el-button>
        <el-button type="primary" @click="resetPassword">确定</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import ValidCode from "../components/common/Validcode.vue";

export default {
  name: "Login",
  components: {
    ValidCode
  },
  data() {
    // 验证码校验
    const validateCode = (rule, value, callback) => {
      if (value === "") {
        callback(new Error("请输入验证码"));
      } else if (value.toLowerCase() !== this.code) {
        callback(new Error("验证码错误"));
      } else {
        callback();
      }
    };

    return {
      code: "", // 验证码组件传递过来的code
      user: {
        code: "", // 表单里用户输入的code 验证码
        username: "",
        password: ""
      },
      rules: {
        username: [{ required: true, message: "请输入账号", trigger: "blur" }],
        password: [{ required: true, message: "请输入密码", trigger: "blur" }],
        code: [{ validator: validateCode, trigger: "blur" }]
      },
      forgetUserForm: {}, // 忘记密码的表单数据
      forgetPassDialogVis: false
    };
  },
  methods: {
    handleForgetPass() {
      // 初始化表单的数据
      this.forgetUserForm = {};
      this.forgetPassDialogVis = true; // 打开忘记密码的弹窗
    },
    resetPassword() {
      // 重置密码
      this.$request.put("/user/password", this.forgetUserForm).then(res => {
        if (res.code === "200") {
          this.$message.success("重置成功");
          this.forgetPassDialogVis = false;
        } else {
          this.$message.error(res.msg);
        }
      });
    },
    getCode(code) {
      this.code = code.toLowerCase(); // 验证码小写
    },
    login() {
      this.$refs["loginRef"].validate(valid => {
        if (valid) {
          // 验证通过
          this.$request.post("/login", this.user).then(res => {
            if (res.code === "200") {
              localStorage.setItem("honey-user", JSON.stringify(res.data)); // 存储用户数据，定义为全局变量honey-user，然后使用stringify转换为字符串存储
              if (res.data.role === "admin") {
                this.$router.push("/admin"); // 跳转到管理员界面
              } else if (res.data.role === "user") {
                this.$router.push("/user"); // 跳转到用户界面
              }
              this.$message.success("登录成功");
            } else {
              this.$message.error(res.msg); // 用后端返回的错误信息提示登录错误
            }
          });
        }
      });
    }
  }
};
</script>

<style scoped></style>
